import java.util.*;

class StringComparator implements Comparator<String> {

@Override
public int compare(String s1,String s2) {
return -s1.compareTo(s2);
}
}

public class Sort5 {
public static void main(String[] args) {
List<String>words = Arrays.asList("B","X","A","M","F","W","O");
Collections.sort(words,new StringComparator());
System.out.println(words);
}
}

